revived #257: Properly decode ANSI encodings (#349)

* Get correct default font

* Create header elements with it's respective class

* Properly decode ANSI encodings

* allow for line breaks when splitting xrefs for id and position

* extend TestCase.php with functionality to "catch" E_NOTICE and E_WARNING

* added test case for this fix

* only reset error handler when the current handler is the handler we had set before

* work around for failing CI build with PHP 5.6

* added comment and link to the workaround getting the current error handler

* removed unnecessary ini_set call

* remove error level constant name before error message

* restore error from the error handler itself, to prevent PHPUnit's "THE ERROR HANDLER HAS CHANGED!" message

* reverse the changes made to the TestCase class and the code in the test case depending on it

* simplified test case, now checking if object has been parsed correctly

* code linting

* applied linting

* handle failed font lookup

* look up unfiltered font resource name first, then fall back to filtered resource name

* added unit test for #202 bugfix, code linting

* fallback for decoding single-byte ANSI characters that are not in the lookup table

* added test file and unit test for international unicode characters

* don't double-encode strings already in UTF-8

* code linting

* removed remnants from old decodeContent() function signature

* parseHeaderElement() should not return a PDFObject

* some minor changes as requested by the review

* keep $unicode as deprecated parameter in decodeContent function signature

* forgot to add default value for $unicode to make it optional

* added proper doc blocks to PostScriptGlyphs.php

* return array from PostScriptGlyphs::getGlyphs() directly instead of using and parsing JSON

* changed @deprecated to parameter description

Co-authored-by: Dāvis Mosāns <[email protected]>

src/Smalot/PdfParser/Document.php

@@ -77,6 +77,7 @@ public function init()
 
         // Propagate init to objects.
         foreach ($this->objects as $object) {
+            $object->getHeader()->init();
             $object->init();
         }
     }

src/Smalot/PdfParser/Encoding.php

@@ -31,6 +31,7 @@
 namespace Smalot\PdfParser;
 
 use Smalot\PdfParser\Element\ElementNumeric;
+use Smalot\PdfParser\Encoding\PostScriptGlyphs;
 
 /**
  * Class Encoding
@@ -95,12 +96,10 @@ public function init()
                 ++$code;
             }
 
-            // Build final mapping (custom => standard).
-            $table = array_flip(array_reverse($this->encoding, true));
-
+            $this->mapping = $this->encoding;
             foreach ($this->differences as $code => $difference) {
                 /* @var string $difference */
-                $this->mapping[$code] = (isset($table[$difference]) ? $table[$difference] : Font::MISSING);
+                $this->mapping[$code] = $difference;
             }
         }
     }
@@ -129,6 +128,6 @@ public function translateChar($dec)
             $dec = $this->mapping[$dec];
         }
 
-        return $dec;
+        return PostScriptGlyphs::getCodePoint($dec);
     }
 }